Edging apparatus



' March 14, 1933- H. J. HAMANN EDGING APPARATUS Filed May 13, 1932lmventor Henra/ c! Hamann.

Gftorneg tainthe said sheets steadier and in a truer,

the edges of Patented Mar. 14 1933 UNITED STATES 'PATENT "oFF-ICE.

HENRY J. HAMANN, OF TOLEDO, OHIO, ASSCIIG-IINI'OIR,r TOLIBBEY-OWENS-FORD GLASS; v

COMPANY, OF TOLEDO, OHIO, A. CORPORATION' OFFOHIO EDGING APPARATSApplication md May 13, 1932. seria1' No.c11,09o.

rlhe present invention relates to glass Yedging apparatus and moreparticularly to novel means for maintaining the glass being edged closedan edging machine including a, supporting framework .designated in' itsentirety i 5. and upon which is, carried arranged channel members" 6 inproper contact with the edging tool.

In the glass surfacing art, it is customary7 to use a continuous type ofmachine for the grinding and/or finishing of the edges f glass sheets.Broadly speaking, with such a machine, a number of spaced sheets ofglass y to be edged are vertically disposed in spaced relation relativeto one another and passedv substantially horizontally over and incontact with one or a lurality of surfacing elements whereby to rstgrind and then polish thesheets. It has been found, however, that withglass sheets of certain contours, diiiiculty is experienced in themoving ofthe sheets over the surfacing elements in that there is atendency for the said sheets to tilt forwardly or rearwardly orotherwise get out of proper contacting relationship4 with said surfacingelements.

It is, therefore, an important object of this invention to provide noveland Vimproved means for use upon edging machines of the above characterwhich will function to maintain the glass sheets in proper operativerelationship with respect to the surfacing elements.

Anotherimportant object of the invention is to provide means engagingthe upper edges of the glass lsheets which rwill serve to mainconditionwith respect to the surfacing elements than heretofore.

Other objects and advantages of the invention will become more apparentduring the course of the vfollowing description `when taken inconnection with the accompanying drawing.

Inthe drawing forming a part of this ap,- plication and wherein likenumerals are employed to vdesignate like parts throughout the same,

Fig. 1 1s a side eleva-tion of a portion of an edging machine with whichthe present invention 1s incorporated,

Fig. 2 is a sectional view taken substan tially on line 2 2 of Fig. 1,and

' by the numeral Fig. 3 is a section line 3 3 of Fig. 2.

taken substantially on t,

Referring now-to the drawing, there the horizontally having positionedtherein the supporting runways 'l' longitudinally grooved as, at V8,.Also carried by of grinding and/or polishing wheels 9 only one of whichhas been shown. However, each `wheel is adapted to be rotated within areceptacle l10 containing a suitable labrasive material and is IdrivenfromV a` lshaft 11 through suitable gearing (not shown). i vThe upperportion of the surfacing wheel 9 is received within an openingbetweentwo adjacent channel members 6, and 'each wheel is 'provided with one ormore grooves 12around f the framework 5are a plurality:

the periphery thereof. These grooves are Y grooves 8 in runways 7 Theparticular `con- -m substantial horizontal alignment with the structionof the surfacing wheel',together with the mounting and drive therefor,have not been illustrated specificallyfsin'ce they constitute nopart ofthe present invention per se. l

Mounted above the runways 7 is an endless sprocket. chain 13 trained ateach end of its loopy about asprocket14, ythe upper runor flight-of thechain being supported upon and vsliding over a stationary supportingmember or table y15. The upper edges of thelsi-de portions of thechannel-members 6 constitute guide rails alongwhich pusher blocks 16 areadapted to beslid, these pusher Vblocks being suitablyl connected to anddriven-forwardly bythe lower flighty of thesprocket chain 13. The pusherblocks are preferably provided with a-plurality of slots-.within whichthe rear vertical edges of the glass sheets 17 fit so that the saidpusher blocks, therefore, serve to advance the glass sheet'for'war-dlyin the direction indicated by the larrow in Fig.- 1.

Slidably supported by the stationarymember or table y is av guidemember18 engaging the vforward edges ofthe glass sheets to guide thesaid sheets and maintain them properlyspaced from one another.

- facing The glass sheets 17 are shown as being rectangular and ofgreater height than width. During the surfacing operation, a pluralityof sheets are first stood on `edge upon one of the runways 7 at theforward end of the machine and are Y maintained in `properly spacedrelation by the guide member 18. rlhe pusher block 16 is then moved toengage the rear edges ofthe sheets and to advance the said sheetsforwardly over successive surwheels 9. As pointed out above, thesurfacing wheels are provided with spaced peripheral grooves 12extending around the periphery grooves is such as to give the .desiredcontour to the edges of the sheets being surfaced.

One of the diiiiculties ordinarilyencountered in surfacing the edges'ofglass sheets upon a machine of the type'describedy hereinabove, residesin the tendency ofthe sheets to move forwardlyv in an ununiform or`jerky fashion, and also in the tendencyof the sheets c, to tip or tilteither forwardly or backwardly depending upon-the profile of ing thevsurfacing. thereof and which naturallythrows themV out of properoperative relationship with respect to the ysurfacing wheel. Theprincipal aim of the present invention therefore is to provide means forovercoming this tendency of the glass sheets to tip, tilt orotherwise'move out of proper position with respect tothe surfacingwheels Yduring the surfacing operation. To this end, there is providednew and novel means engaging the upper edges of the glass sheets,

Y which means offers a controllable amount of and being provided in itsperiphery with one glass sheets resistance to the forward movementof theover the surfacing wheels. Inorder to accomplish the above, there isarranged opposite each surfacing lwheel 9 a vertical standard 19provided with a vertical slot 20 in which is slidably mounted a block21. The block 21 and associated parts are supported by a cable22-connected at .one end 4to the. block and passing upwardly overapulley 23 carried by standardf19.:V Secured vto the opposite end of thecable is a counter- Vweight 24 whichv serves to counterbalance the iblock 21V and Carriedv by the the parts carried thereby. 1

block 21 is a forwardly` directed horizontal pin or trunnion' 25 uponrwhich is pivotally mounted a sleeve 26. Cai'- Vried by orY formedintegral with this sleeve is a rod 27 upon vwhich is slidable a weight28 held in the desired adjusted position by a set screwk 29. Alsocarried by or" formed integral with the sleeve 26 and extending atsubstantially right anglesto lthe rod l27 is an arm 30 terminating in yabearing portion 31 Y within which is mounted one end of the horizontalshaft 321 Botatably `mounted Kupon' this shaft is fa'roller 33preferablyv formed of rubber or a rubber composition material or aplurality of grooves 34 disposed in verf in place by a thereof, and theshape of these the glass dur- `ing opposite ends of bytightening up orwardly of roller 33 is a .circular metal plate 36 provided with a seriesof round-headed projections or knobs 37 which engage the adjacent end ofroller 33. vCarried'by the plate 36 is a fiber'disc 38 and fired uponthe shaft inwardly of disc 38 is a collar 39 secured set screw or thelike 40.

Also loosely mounted upon theshaft 32 outwardly of theroller 33 is ametal plate 41 'similar to plate 36 and being ,likewisep'rovided with aplurality `of knobs orprojections 42 which engage the outerend of theroll-er. 'Secured to the-back vof the plate 41 'is a-iiber'disc43similar to disc 38. The outshaft 32 is threaded as at 44, and

er end'of threaded thereupon is a collar`45 held in place by a set screw46.V

AFrom the above, roller-.is adapted to 32 and that the metal plates V36and 41 are caused to rotate therewith due tothe provisionofthe knobs Yorstuds 37 and 42 engagsaid roller. Also, that loosening the collar 45,the roller can be moved longitudinally upon the shaft 32 so as to eitherincrease or decrease the amount of friction between-the liber discs 38and 43 and the 'lars 39 and 445. Y

lof the glass sheetsy 17, the upper edges thereof are adapted tobereceived within the .grooves 34 in the. corresponding roller 33.

Although 'composite or safety glass has been illustrated inv Fig. 2, yetit will be readily apparent that this machine may be used for grindingthe edges of plate glass as well as other flat sheets or plates. f Y

V- In operation, the glass sheets tobe treated are first .mounted-.uponone of the runways 7 at the forward@` end of the Vmachinev and placed inposition ly over the surfacing wheels.

ticular machine herein shown, glass 17 (Fig. 2)(.of similar shape andsize are placed side by side and movable as a unit or a groupsimultaneously over the surfacing With the parwheels. c Uponactuation ofthe pusher device lrespective col#v five sheets of it will be seen.that-the freely vrotate upon shaft e for movement horizontaleachvsuccessive surfacing wheel, the upper edges of the sheets will movebeneath and in Contact with-the respective roller 33. vDue to the weightexerted by the roller-upon the upper edges of the glass ysheets,`tl iesaid sheets j will be held downwardly in'contact'with the surfacingwheel. lin-order to prevent either forward or backward tippingV ortilting of the glass sheets during the surfacing thereof, and also toinsure proper working relationship between the glass and surfacingwheel, the collar 45 is adjusted upon shaft 32 whereby to cause abinding action between the fiber discs 38 and 43 (which rotate with`metal plates 36 and 41), and the respective collars 39 and 45 which arefixed to the shaft.

rIhis will serve to exert a braking or retarding action upon the rollerand will thereby prevent said roller from freely rotating upon shaft 32.While in some cases it may be desirable to permit free rotation of theroller, yet it has been found by actual experience that with some sizesand shapes of glass sheets, the braking or retarding of the roller in amanner to prevent free rotation thereof is of considerable importance,and that much more satisfactory edging results are obtained than wherethe roller is allowed to freely rotate. As set forth above, there is atendency for the glass sheets to tip or tilt either forwardly orbackwardly during the surfacing thereof depending upon the profile ofthe glass, and it has been found that by preventing free rotation of theroller so as to provide greater friction between the rollerl and glasssheets, the said sheets are held much steadier, are maintained in a.truer condition,

and the tendency thereof to tip or tilt is eliminated.

It is to be understood that the form of the invention herewith shown anddescribed is to be taken as the preferred embodiment of the same, andthat various changes in the shape, size and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claims.

I claim:

1. In a machine for grinding an edge of a plate of glass, thecombination of grinding means upon which the glass is partiallysupported on edge while being ground, means cooperating with thegrinding means for guidingly supporting said plate of glass dur-V inggrinding thereof, a roller engaging the upper edge of the glass platefor maintaining it in a vertical position and in engagement with thegrinding means, and means for preventing free rotation of said roller.

2. In a machine for grinding an edge of a plate of glass, thecombination of grinding means upon which the glass is partiallysupported on edge while being ground, means cooperating with thegrinding means for guidingly supporting said plate of glassduringgrinding thereof, a roller engaging the upper edge of the glass platefor maintaining it in a vertical position and in engagement with thegrinding means, and frictional means for retarding the rotation of saidroller. I

3. In a machine for a plate of glass, ing means upon grinding an edge ofthe combination of grindwhich the glass is partially guidinglysupporting ing grinding thereof,

supported on edgel while being ground, means cooperating with thegrinding means for guidingly supporting said plate of glass dur- 4.' Inamachine for. grinding an edge'of' a grinding y meansupcn which the glassis .partially supplate of, glass,'fthe combination of ported yon edgewhile VbeingI ground, 'means cooperating with the "grinding means forguidingly supportingisaidplate of glass during grinding thereof, 'aroller engaging the upper edge i of the "glass plate for1 ,maintainingit in a vVertical position andin engagement with the grinding means,ashaft upon which said roller is rotatably mounted, and means" carried"by thel shaft "and 'engaging opposite 'ends ofsaid lroller for.preventing the free rotation thereof. Y 5. InY a machine for grindingan'edgerof a plate-of` glass, the combination of grinding meansuponAwhichthe glass is partially supported on edge while being ground,means'cooperating with the grinding means for guidringly supporting saidvplate of glass duringI grinding thereof, aroller engaging the up-v peredge of the glass plate for maintaining it in a vertical position withthe grinding means,

said roller is rotatably mounted, members carried by the shaft atopposite ends of the roller and rotatable with said roller, and

and in engagement a shaft upon which means frictionally`-engaging saidmembers for preventing free rotation ofthe roller.

6. In a machine for grinding an edge of a the combination of grinding'lingv grinding thereof, a roller engaging the@ upper edge of the glassplate for maintaining it in a vertical position and in engagement withthe grinding means, a'sliaftv upon which said roller is rotatablymounted, members; by the shaft at opposite ends of the:

carried roller and rotatable withV said roller, andad- -ditional membersfixed to the shaft and frictionally engaging the first mentioned membersfor preventing free rotation of the roller.

- 7. In a machine for plate of glass, the combination of means uponwhich the ported on edge while grinding glass is partially supbeingground, means cooperating with the grinding lmeans fori` said plate ofglass dur` a roller engaging the upperedge of the glass plate formaintaining it in avertic al"position and lin engage'- grinding an edgeof a ment with therfgrinding means, 'a'sliaft upon *130 ywhich saidrolleris rotatably mounted, members carried by the shaft at oppositeends of Y the roller and rotatable With said roller, ber

discs carried by said members, and means frictionally engaging saidliber discs for preventing free rotation of the roller.

" 8. In a machine for grinding an edge of a the combination 0f grindingplate of glass,

the glass is partially sup'- means upon which ported on edge While beingground, means cooperatingy with the grinding meansy for guidinglysupporting said plate of glass durn ing grindingfthereof, a rollerengaging they upper edge of the glass plate for maintaining it in avertical position and in engagement With the grinding means, a shaftupon which said rollerl is rotatably mounted,y members carried by theshaft at opposite ends of the roller androtatable With said roller,fiber discs carried by said members, and addi4 tional Vmembers iXed tothe shaft and fric-v tionally engaging the fiber discs for prevent- Yingr free rotation of the roller.v

Signed at Toledo,in the county of Lucas and State of Ohio, this 9th dayoffMayl 1932. Y HENRY J. llAMANN.'

